Dwayne Johnson takes on jumbo, aggressive, mutated creatures in an epic cheesefest featuring a silverback gorilla named George who flips the bird at The Rock. Wrong target, George. It's the movie that deserves the finger.
When Johnson is doing that movie action star thing he does so well and giant animals are going enormous-mano-a-enormous-mano, there's undeniably goofy fun to be had. You just have to be patient during the downtime.
It may be based on a video game, but it plays like a live-action cartoon, one that doubles as a fantastical journey into the imagination and sensibility of a 10-year-old boy, complete with rude hand gestures and goofy declarations of badassery.